import pandas as pd

s1 = pd.Series(['白糖', '玉米', '小麦'])
print(s1)

s2 = pd.Series(['白糖', '玉米', '小麦'], index=['a001', 'a002', 'a003'])
print(s2)

s3 = pd.Series({'a001': '白糖', 'a002': '玉米', 'a003': '小麦'})
print(s3)
